A Study of the Drugs Selumetinib Versus Carboplatin/Vincristine in Patients With Neurofibromatosis and Low-Grade Glioma

  • End date
    May 1, 2027
  • participants needed
  • sponsor
    National Cancer Institute (NCI)
Updated on 28 July 2021
absolute neutrophil count
ejection fraction
metastatic disease
tumor growth
glomerular filtration rate
neutrophil count
tumor cells
gilbert disease
subependymal giant cell astrocytoma
giant cell astrocytoma


This phase III trial studies if selumetinib works just as well as the standard treatment with carboplatin/vincristine (CV) for subjects with NF1-associated low grade glioma (LGG), and to see if selumetinib is better than CV in improving vision in subjects with LGG of the optic pathway (vision nerves). Selumetinib is a drug that works by blocking some enzymes that low-grade glioma tumor cells need for their growth. This results in killing tumor cells. Drugs used as chemotherapy, such as carboplatin and vincristine, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. It is not yet known whether selumetinib works better in treating patients with NF1-associated low-grade glioma compared to standard therapy with carboplatin and vincristine.



I. To determine whether the efficacy of treatment with selumetinib sulfate (selumetinib) as measured by event-free survival (EFS) is non-inferior to treatment with carboplatin/vincristine sulfate (vincristine) (CV) in previously untreated neurofibromatosis type 1 (NF1)-associated low-grade glioma (LGG).

II. To determine whether visual acuity (VA) using Teller acuity cards (TAC), in patients with NF1-associated LGG within the optic pathway, is better in those treated with selumetinib compared to CV.


I. To estimate tumor response rates and overall survival (OS) in each treatment regimen in previously untreated NF1-associated LGG.

II. To evaluate VA outcomes utilizing HOTV letter acuity testing in previously untreated NF1-associated LGG within the optic pathway in patients who are old enough to perform visual acuity testing utilizing HOTV (a recognition acuity measure).

III. To describe the improvement in motor function as measured by the Vineland scale in patients with previously untreated NF1-associated LGG that have documented motor deficits at enrollment.

IV. To prospectively evaluate and compare the quality of life among patients treated with selumetinib or CV.

V. To prospectively evaluate and compare the cognitive, social, emotional, and behavioral functioning of patients with NF1-associated LGG treated with either selumetinib or CV.


I. To evaluate optical coherence tomography (OCT) measures of retinal axon and ganglion cell thickness as a marker of treatment response in previously untreated NF1-associated LGG within the optic pathway.

II. To compare novel, semi-automated volumetric magnetic resonance imaging (MRI) measures to traditional measurements of treatment response (bi-dimensional MRI measurements) in NF1-associated optic pathway tumors.

III. To obtain paired blood and tumor tissue to be banked for future NF1-LGG biology studies involving comprehensive molecular analysis, including but not limited to whole exome and ribonucleic acid (RNA) sequencing.

OUTLINE: Patients are randomized to 1 of 2 arms.


INDUCTION: Patients receive carboplatin intravenously (IV) over 60 minutes on days 1, 8, 15, 22, 43, 50, 57, and 64 and vincristine IV or IV push over 1 minute on days 1, 8, 15, 22, 29, 36, 43, 50, 57, and 64 in the absence of disease progression or unacceptable toxicity.

MAINTENANCE: Patients receive carboplatin IV over 60 minutes on days 1, 8, 15, and 22 and vincristine IV or IV push over 1 minute on days 1, 8, and 15. Treatment repeats every 6 weeks for 8 cycles in the absence of disease progression or unacceptable toxicity.

ARM II: Patients receive selumetinib sulfate orally (PO) twice daily (BID) on days 1-28. Treatment is continuous and repeats every 28 days for 27 cycles in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed up with MRIs and physical exams every 3 months for 1 year, every 6 months for 2 years, and then once yearly for up to 10 years.

Condition Neurofibromatosis, von Recklinghausen's Disease, Peripheral Neuropathy, Low Grade Glioma, Visual Pathway Glioma
Treatment questionnaire administration, quality-of-life assessment, vincristine sulfate, carboplatin, Selumetinib, vincristine, Selumetinib Sulfate
Clinical Study IdentifierNCT03871257
SponsorNational Cancer Institute (NCI)
Last Modified on28 July 2021


Yes No Not Sure

Inclusion Criteria

Patients must have a body surface area (BSA) of >= 0.5 m^2 at enrollment
Patients must have neurofibromatosis type 1 (NF1) based on clinical criteria and/or germline genetic testing
Patients must be newly diagnosed or have previously diagnosed NF-1 associated LGG that has not been treated with any modality other than surgery
For patients with optic pathway gliomas (OPGs)
Newly-diagnosed patients with OPG are eligible if there are neurologic symptoms (including visual dysfunction, as defined below) or other exam findings associated with the tumor
Previously-diagnosed patients with OPG are eligible if they have new or worsening neurologic symptoms (including visual dysfunction, as defined below) or have tumor growth
For both newly-diagnosed and previously-diagnosed OPG, the patient may be eligible, irrespective of whether there has been tumor growth or other neurological symptoms or worsening, if they meet at least one of the following visual criteria
Visual worsening, defined as worsening of visual acuity (VA) or visual fields (VF) documented within the past year (by examination or history); OR
Significant visual dysfunction (defined as VA worse than normal for age by 0.6 logMAR [20/80, 6/24, or 2.5/10] or more in one or both eyes)
For patients with LGG in other locations (i.e., not OPGs)
Newly-diagnosed patients with LGG are eligible if there are neurologic symptoms or other exam findings associated with the tumor
NOTE: Newly-diagnosed patients with LGG without associated neurologic symptoms or exam findings are not eligible
Previously-diagnosed patients with LGG are eligible if they have new or worsening neurologic symptoms or have tumor growth
Although not required, if a biopsy/tumor resection is performed, eligible histologies will include all tumors considered LGG or low-grade astrocytoma (World Health Organization [WHO] grade I and II) by 5th edition WHO classification of central nervous system (CNS) tumors with the exception of subependymal giant cell astrocytoma
Patients must have two-dimensional measurable tumor >= 1 cm^2
Patients with metastatic disease or multiple independent primary LGGs are allowed on study
Creatinine clearance or radioisotope glomerular filtration Rate (GFR) >= 70 mL/min/1.73 m^2 OR a serum creatinine based on age/gender within 7 days prior to enrollment as follows
Age; maximum serum creatinine (mg/dL)
to < 6 years; 0.8 (male) and 0.8 (female)
to < 10 years; 1 (male) and 1 (female)
to < 13 years; 1.2 (male) and 1.2 (female)
to < 16 years; 1.5 (male) and 1.4 (female)
>= 16 years; 1.7 (male) and 1.4 (female)
Total bilirubin =< 1.5 x upper limit of normal (ULN) for age within 7 days prior to enrollment (children with a diagnosis of Gilbert's syndrome will be allowed on study regardless of their total and indirect [unconjugated] bilirubin levels as long as their direct [conjugated] bilirubin is < 3.1 mg/dL)
Serum glutamate pyruvate transaminase (SGPT) (alanine aminotransferase [ALT]) =< 3 x upper limit of normal (ULN) = 135 U/L within 7 days prior to enrollment. For the purpose of this study, the ULN for SGPT is 45 U/L
Albumin >= 2 g/dL within 7 days prior to enrollment
Left ventricular ejection fraction (LVEF) >= 53% (or institutional normal; if the LVEF result is given as a range of values, then the upper value of the range will be used) by echocardiogram within 7 days prior to enrollment
Corrected QT (QTc) interval =< 450 msec by electrocardiography (EKG) within 7 days prior to enrollment
Absolute neutrophil count >= 1,000/uL (unsupported) within 7 days prior to enrollment
Platelets >= 100,000/uL (unsupported) within 7 days prior to enrollment
Hemoglobin >= 8 g/dL (may be supported) within 7 days prior to enrollment
Patients with a known seizure disorder should be stable and should have not experienced a significant increase in seizure frequency within 2 weeks prior to enrollment
Patients 2-17 years of age must have a blood pressure that is =< 95th percentile for age, height, and gender at the time of enrollment. Patients >= 18 years of age must have a blood pressure =< 130/80 mmHg at the time of enrollment (with or without the use of antihypertensive medications)
Note: Adequate blood pressure can be achieved using medication for the treatment of hypertension
All patients must have ophthalmology toxicity assessments performed within 4 weeks prior to enrollment
For all patients, an MRI of the brain (with orbital cuts for optic pathway tumors) and/or spine (depending on the site(s) of primary disease) with and without contrast must be performed within 4 weeks prior to enrollment
For patients who undergo a surgery on the target tumor (not required), a pre- and post-operative MRI of the brain (with orbital cuts for optic pathway tumors) or spine (depending on the site(s) of primary disease) with and without contrast must also be performed within 4 weeks prior to enrollment
The post-operative MRIs should be performed ideally within 48 hours after surgery if possible
Patients must have a performance status corresponding to Eastern Cooperative Oncology Group (ECOG) scores of 0, 1, or 2. Use Karnofsky for patients > 16 years of age and Lansky for patients =< 16 years of age
Patients must have the ability to swallow whole capsules
Patients must have receptive and expressive language skills in English or Spanish to complete the quality of life (QOL) and neurocognitive assessments
All patients and/or their parents or legal guardians must sign a written informed consent
All institutional, Food and Drug Administration (FDA), and National Cancer Institute (NCI) requirements for human studies must be met

Exclusion Criteria

Patients must not have received any prior tumor-directed therapy including chemotherapy, radiation therapy, immunotherapy, or bone marrow transplant. Prior surgical intervention is permitted
Patients with a concurrent malignancy or history of treatment (other than surgery) for another tumor within the last year are ineligible
Patients may not be receiving any other investigational agents
Patients with any serious medical or psychiatric illness/ condition, including substance use disorders likely in the judgement of the investigator to interfere or limit compliance with study requirements/treatment are not eligible
Patients who, in the opinion of the investigator, are not able to comply with the study procedures are not eligible
Female patients who are pregnant are not eligible since fetal toxicities and teratogenic effects have been noted for several of the study drugs. A pregnancy test is required for female patients of childbearing potential
Lactating females who plan to breastfeed their infants are not eligible
Sexually active patients of reproductive potential who have not agreed to use an effective contraceptive method for the duration of their study participation and for 12 weeks after stopping study therapy are not eligible
Note: Women of child-bearing potential and males with sexual partners who are pregnant or who could become pregnant (i.e., women of child-bearing potential) should use effective methods of contraception for the duration of the study and for 12 weeks after stopping study therapy to avoid pregnancy and/or potential adverse effects on the developing embryo
Cardiac conditions
Known genetic disorder that increases risk for coronary artery disease. Note: The presence of dyslipidemia in a family with a history of myocardial infarction is not in itself an exclusion unless there is a known genetic disorder documented
Symptomatic heart failure
New York Heart Association (NYHA) class II-IV prior or current cardiomyopathy
Severe valvular heart disease
History of atrial fibrillation
Ophthalmologic conditions
Current or past history of central serous retinopathy
Current or past history of retinal vein occlusion or retinal detachment
Patients with uncontrolled glaucoma
If checking pressure is clinically indicated, patients with intraocular pressure (IOP) > 22 mmHg or ULN adjusted by age are not eligible
Ophthalmological findings secondary to long-standing optic pathway glioma (such as visual loss, optic nerve pallor, or strabismus) or longstanding orbito-temporal plexiform neurofibroma (PN, such as visual loss, strabismus) will NOT be considered a significant abnormality for the purposes of the study
Treatments and/or medications patient is receiving that would make her/him ineligible, such as
Supplementation with vitamin E greater than 100% of the daily recommended dose. Any multivitamin containing vitamin E must be stopped prior to study enrollment even if less than 100% of the daily recommended dosing for vitamin E
Surgery within 2 weeks prior to enrollment, with the exception of surgical placement for vascular access or cerebrospinal fluid (CSF) diverting procedures such as endoscopic third ventriculostomy (ETV) and ventriculo-peritoneal (VP) shunt
Note: Patients must have healed from any prior surgery prior to enrollment
Patients who have an uncontrolled infection are not eligible
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